Spring hinge



(Mod e1.)

J. H. SHAW.

SPRING HINGE,

No. 309,104; Patented Dec. 9;'1884..

' end of the part F is made tubular.

Unirnn S'ra'rns a'rnn'r tries,

J OHN H. SHAWV, OF NEW? HAVEN, CONNECTICUT, ASSIGNOR TO EAR-GENT 82 CO.,OF SAME PLACE.

SPRING HINGE.

SPECIFICATION forming part of Letters Patent No. 309,104, dated December9, 1884.

(Merlot) T 0 to whom it may concern:

- Be it known that I, JOHN H. SHAW, of New Haven, in the county of NewHaven and State of Connecticut, have invented a new Improvement inSpringHinges; and I do hereby declare the following, when taken inconnection withaeeompanying drawings and the letters of reference markedthereon, to be a full, clear, and exact description of the same, andwhich said drawings eonstitutepart of this specification, and represent,in-

Figure 1, a vertical sectional view; Fig. '2, a transverse section online 00 00,- Fig. 3, a transverse seetion on line y y,- Fig. 4, atransverse section on line 2 z.

This invention relates to an improvement in that class of spring-hingesin which the two parts of the hinge are constructed with cars at theirrespective ends to set together, and so as to leave a space in thecentral part of the knuckle, into which space a spiral spring isintroduced around the pintle, one end of the spring to take a bearingupon one leaf and the other end upon the other leaf, the action of thespring being to turn the two leaves together or open them, as the casemay be, and according to the action of the spring, the objeet being toprovide a means of adjustment for the spring, or its entire release,without longitudinally moving the pintle; and it consists in theconstruction as hereinafter de scribed, and more particularly recited inthe claim.

A B represent the two ears of one leaf of the hinge, and C D the twocars of the other leaf, and in the usual form of construction, so as toleave a space between the intermediate cars, A B, for the introductionof the spring. These ears are bored to receive the pintle, also in theusual manner. The pintle is made in two parts, E F, and, as hererepresented, the part E is the top and F the bottom. The part F isconstructed with a shoulder, a, to abut against the ear D, the body ofthe pintle fitting the two cars B D. The upper It is inserted upwardthrough the ear D into the ear B. The other part, E, is of like shape,so as to pass through the two upper ears, A C, and with ashoulder, Z),to rest upon the top of the ear C. This part E extends downward, itslower end, d, fitted to enter the part F, as shown, and so that the partF forms a bearing for the lower end of the part E. The end 01, withinthe pintle F, is constructed with an an nular groove, 0. A screw, f, isintroduced through the ear B of one part of the hinge into the tubularpart F, and so that its inner end will enter the annular groove e in thepart E. This screw f couples the part F of the pintle with one part ofthe hinge, and also prevents the part E from being withdrawn. Throughthe ear C-that is, the ear of the other part of the hingea pin, h, isintro duced to entera corresponding hole in the part E of the spindle,and so as to couple this second part of the hinge with the part E of thepintle. Thus it will be seen that the part F of the pintle is coupledwith one part of the hinge and the part E with the other part. On thepintle, between the cars A B, is a longitudinal groove, i. Around thepintle, between the ears A B, a helical spring, H, is introduced, oneend, I, turned inward to enter the groove 2'' in the part E of thepintle. The other end, an, is arranged to bear upon the leaf of thehinge with which the part F of the pintle is engaged. By this usualarrangement of the spring one end of the spring bears upon one leafdirectly and the other end upon the pintle which is engaged with theother leaf.

The head I, or exposed portion of the part E, is constructed ofpolygonal shape, as at a, or may be with holes 1), by which that part ofthe pintle may be turned by applying a wrench to the polygonal portiona, or a leverinto one of the holes 1).

To adjust the spring the pin it is removed and the part E of the pintleturned until the re quired tension ofthe spring is attained. Then thepin it is introduced to enter the corresponding hole in the part E. Theturning of the part E winds the spring, and the introduction of the pinit couples the pintle with its part of the hinge, holding the springunder tension.

The method of turning the pintle so as to wind the spring is awell-known device, so also is the longitudinal groove t in the pintle,which enables the pintle to be introduced at one end, pass down to theopposite end of the 5 other, and introducing the screw or pin f throughthe one part of the hinge into the said other part of the pintle, andinto an annular groove on said one part, the one part of the pintle ispermitted to turn on the other, yet

IO, accidental separation of the two parts is pre vented. If, however,at any time it is desir able to separate the two parts of the hinge, itis only necessary to remove the screw or pin f and the pin h. Then thepintle may be with- I 5 drawn. This construction of pintle also makes astrong and firm joint, and the hinge, as a whole, is not liable toderangement.

I clain1 In a spring-hinge substantially such as de- 20 scribed, thecombination of the two parts of the hinge, each constructed with ears,which set together form the knuckle, the part F of the pintle introducedthrough the cars at one end and secured to one part of the hinge, itsinner end of tubular shape, the part E of the pintle introduced throughthe other end and detachably secured to the other part of the hinge, itsinner end constructed to enter the tubular portion of the part F of thepintle, and also constructed with an annular groove, the pin f, whichsecures the one part of the hinge to the part E of the pintle, arrangedto enter the said annular groove in the part E of the pintle, and aspring around said pintle, one end arranged to take its bearing in thepart E of the pintle, the other to take its bearing on the part of thehinge with which the part E of the pintle is engaged, substantially asdescribed.

JOHN H. SHAW.

WVitnesses:

Jos. O. EARLE, JOHN EDWARDS, Jr.

